forked from Mirrors/helix
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91 lines
2.9 KiB
Rust
91 lines
2.9 KiB
Rust
use anyhow::{Error, Result};
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use helix_core::Position;
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use std::path::{Path, PathBuf};
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#[derive(Default)]
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pub struct Args {
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pub display_help: bool,
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pub display_version: bool,
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pub load_tutor: bool,
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pub verbosity: u64,
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pub files: Vec<(PathBuf, Position)>,
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}
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impl Args {
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pub fn parse_args() -> Result<Args> {
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let mut args = Args::default();
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let argv: Vec<String> = std::env::args().collect();
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let mut iter = argv.iter();
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iter.next(); // skip the program, we don't care about that
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for arg in &mut iter {
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match arg.as_str() {
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"--" => break, // stop parsing at this point treat the remaining as files
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"--version" => args.display_version = true,
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"--help" => args.display_help = true,
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"--tutor" => args.load_tutor = true,
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arg if arg.starts_with("--") => {
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return Err(Error::msg(format!(
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"unexpected double dash argument: {}",
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arg
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)))
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}
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arg if arg.starts_with('-') => {
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let arg = arg.get(1..).unwrap().chars();
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for chr in arg {
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match chr {
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'v' => args.verbosity += 1,
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'V' => args.display_version = true,
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'h' => args.display_help = true,
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_ => return Err(Error::msg(format!("unexpected short arg {}", chr))),
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}
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}
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}
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arg => args.files.push(parse_file(arg)),
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}
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}
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// push the remaining args, if any to the files
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for arg in iter {
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args.files.push(parse_file(arg));
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}
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Ok(args)
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}
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}
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/// Parse arg into [`PathBuf`] and position.
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pub(crate) fn parse_file(s: &str) -> (PathBuf, Position) {
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let def = || (PathBuf::from(s), Position::default());
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if Path::new(s).exists() {
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return def();
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}
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split_path_row_col(s)
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.or_else(|| split_path_row(s))
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.unwrap_or_else(def)
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}
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/// Split file.rs:10:2 into [`PathBuf`], row and col.
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///
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/// Does not validate if file.rs is a file or directory.
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fn split_path_row_col(s: &str) -> Option<(PathBuf, Position)> {
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let mut s = s.rsplitn(3, ':');
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let col: usize = s.next()?.parse().ok()?;
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let row: usize = s.next()?.parse().ok()?;
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let path = s.next()?.into();
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let pos = Position::new(row.saturating_sub(1), col.saturating_sub(1));
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Some((path, pos))
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}
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/// Split file.rs:10 into [`PathBuf`] and row.
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///
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/// Does not validate if file.rs is a file or directory.
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fn split_path_row(s: &str) -> Option<(PathBuf, Position)> {
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let (row, path) = s.rsplit_once(':')?;
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let row: usize = row.parse().ok()?;
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let path = path.into();
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let pos = Position::new(row.saturating_sub(1), 0);
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Some((path, pos))
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}
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